As you might imagine, creating a new product is an extremely broad and open-ended topic that can quickly get out of hand. If an interviewer asks you to walk through how you might create a new product, take the following approach to better structure your answer:
1) Identify and validate a problem
Feel free to use a whiteboard here but the easiest way to come up with some product ideas is to spend some time thinking about some problems you’ve noticed in your own life. Once you’ve jotted down a few problems you’ve noticed, talk through how you might speak with potential users to validate the problem. You should be as detailed as possible and explain how you might find these users, what questions you would ask, and how you would document their needs.